so when do i change to flowering

my plants are week old clones of grand daddy purps and i transplated them to soil 3 days ago. i know its early but at about 18 inch is that cool to change to 12/12

209growguy said:

my plants are week old clones of grand daddy purps and i transplated them to soil 3 days ago. i know its early but at about 18 inch is that cool to change to 12/12

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depends on how powerfull your light is, a 1000 watt light could penetrate down to a bigger plant and give you more weed but if you want get a crop ASAP then go for it. Clones are sexually mature enough to flower as soon as rooted.

[quote Clones are sexually mature enough to flower as soon as rooted.[/quote]
As long as they where cloned from a mature plant. Look for Alternating nodes in veg.
At 18" you should have a nice plant to flower, but if you wait until 22+ you will have even a nicer plant to flower. Patience pays off.

it all depends on lights and hight limit youare working with

10x7 at 9 ft tall 1000hps and a 400hps but its not up yet just the 1000 is up ac unit exhaused and fans check out my pics it will give you an idea of what i have going on

if you 9' ceilings with a 100w i'd veg those girls to atleast 24" if not more, bigger plants, more harvest!!

holy hell.. 1400 W total.. let 'em get gigantic. Take clones first, so you don't have to fuck around buying more clones.